Hydrangea root (Hydrangea arborescens) helps to prevent gravel deposits from forming, it helps to relieve the pain as the gravel passes through the ureters from the kidneys to the bladder. It has also helped to regulate the glands of the body.
 
Other uses:
mucous irritations of the bladder
bladder infections
cystitis
nephritis
enlarged prostate
bronchial afflictions
arthritis
gallstones
gonorrhea
gout
kidney stones
rheumatism
urinary problems